Update sqlite3 requirement from ~> 1.3.6 to ~> 1.4.0

[dependabot-preview]

Updates the requirements on sqlite3 to permit the latest version.

Changelog

Sourced from sqlite3's changelog.

=== 1.4.0

• Enhancements

  • Better aggregator support

• Bugfixes

  • Various

=== 1.3.13

• Enancements
  • Support SQLite flags when defining functions
  • Add definition for SQLITE_DETERMINISTIC flag

=== 1.3.12

• Bugfixes:
  • OS X install will default to homebrew if available. Fixes #195

=== 1.3.11 / 2015-10-10

• Enhancements:

  • Windows: build against SQLite 3.8.11.1

• Internal:

  • Use rake-compiler-dock to build Windows binaries. Pull #159 [larskanis]
  • Expand Ruby versions being tested for Travis and AppVeyor

=== 1.3.10 / 2014-10-30

• Enhancements:
  • Windows: build against SQLite 3.8.6. Closes #135 [Hubro]

=== 1.3.9 / 2014-02-25

• Bugfixes:
  • Reset exception message. Closes #80
  • Reduce warnings due unused pointers. Closes #89
  • Add BSD-3 license reference to gemspec. Refs #99 and #106

=== 1.3.8 / 2013-08-17

• Enhancements:

  • Windows: build against SQLite 3.7.17

• Bugfixes:

  • Reset exception message. Closes #80
  • Correctly convert BLOB values to Ruby. Closes #65
  • Add MIT license reference to gemspec. Closes #99
  • Remove unused pointer. Closes #89

... (truncated)

Commits

• 5c36dbe Bump version, fix license
• b6862d8 Merge pull request #236 from sparklemotion/test-build
• f4ffec2 SQLite3 uses dl, so we need to ensure it's linked
• f9b5a46 print the build log after success too
• 942d067 Try catting the mkmf.log file if there is a failure
• fd285ba remove ds store
• 918ffe0 Merge pull request #232 from WA9ACE/sqlcipher-flag
• 75aaafe extraneous comment
• 16e4ee8 added automatic support for and an eh? method for sqlcipher
• 3fd6dda sqlcipher needs SQLITE_HAS_CODE and SQLITE_TEMP_STORE
• Additional commits viewable in compare view

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[dependabot-preview]

Superseded by #584.